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La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (104)
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Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users. -
Participer à sa traduction
10 avril 2011Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
Actuellement MediaSPIP n’est disponible qu’en français et (...) -
MediaSPIP Player : problèmes potentiels
22 février 2011, parLe lecteur ne fonctionne pas sur Internet Explorer
Sur Internet Explorer (8 et 7 au moins), le plugin utilise le lecteur Flash flowplayer pour lire vidéos et son. Si le lecteur ne semble pas fonctionner, cela peut venir de la configuration du mod_deflate d’Apache.
Si dans la configuration de ce module Apache vous avez une ligne qui ressemble à la suivante, essayez de la supprimer ou de la commenter pour voir si le lecteur fonctionne correctement : /** * GeSHi (C) 2004 - 2007 Nigel McNie, (...)
Sur d’autres sites (12099)
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How to fix : Frame rate differs from source after encoding certain mp4 videos to wmv
25 juin 2019, par hpenhpI’m having trouble with a usually working ffmpeg script for encoding mp4 and more to wmv. The goal is to keep it like the original, except for the resolution (smaller) and the format (wmv).
When it usually works for a lot of videos, on some of them it doesn’t... and i would like to understand and avoid that.
I tried several things, forcing the framerate for the output, using -vsync 2 option, -vsync 0 also.. noone of that fixed the issue.
An other thing, worth adding, is that the fps value from media info is good (24 fps) on the output like the input, but through the M$ windows explorer, it says 30 frames per sec, and when you play the video you see that the text that was matching the input doesn’t match the output any more (because of the fps mismatching).
Below the script i use :
ffmpeg -threads auto -i input.mp4 -s 480*320 -b:v 1000k -vcodec msmpeg4 -acodec wmav2 -f asf output.wmvHere is the ffmpeg log :
ffmpeg version 3.4.1-1~16.04.york0 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.5) 20160609
configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
WARNING: library configuration mismatch
avcodec configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './test_2k-24__hq_960x540.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41isomavc1
creation_time : 2019-05-27T14:37:50.000000Z
Duration: 01:28:52.80, start: 0.000000, bitrate: 1232 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 960x540, 1091 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc (default)
Metadata:
creation_time : 2019-05-27T14:37:50.000000Z
handler_name : L-SMASH Video Handler
encoder : AVC Coding
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 137 kb/s (default)
Metadata:
creation_time : 2019-05-27T14:37:50.000000Z
handler_name : L-SMASH Audio Handler
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> msmpeg4v3 (msmpeg4))
Stream #0:1 -> #0:1 (aac (native) -> wmav2 (native))
Press [q] to stop, [?] for help
Output #0, asf, to '/nas/copiedetravail/test_2k-24__hq_960x540.mp4.wmv':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41isomavc1
WM/EncodingSettings: Lavf57.83.100
Stream #0:0(und): Video: msmpeg4v3 (msmpeg4) (MP43 / 0x3334504D), yuv420p(progressive), 480x320, q=2-31, 1000 kb/s, 24 fps, 1k tbn, 24 tbc (default)
Metadata:
creation_time : 2019-05-27T14:37:50.000000Z
handler_name : L-SMASH Video Handler
encoder : Lavc57.107.100 msmpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/1000000 buffer size: 0 vbv_delay: -1
Stream #0:1(und): Audio: wmav2 (a[1][0][0] / 0x0161), 48000 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
creation_time : 2019-05-27T14:37:50.000000Z
handler_name : L-SMASH Audio Handler
encoder : Lavc57.107.100 wmav2
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 31 times
frame= 228 fps=0.0 q=2.0 size= 291kB time=00:00:09.45 bitrate= 252.4kbits/s speed=18.9x
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 1 times
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
Last message repeated 1 times
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
Last message repeated 1 times
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
Last message repeated 5 times
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 2 times
frame= 449 fps=449 q=2.0 size= 663kB time=00:00:18.98 bitrate= 286.2kbits/s speed= 19x
frame= 629 fps=418 q=1.6 size= 1307kB time=00:00:26.16 bitrate= 409.2kbits/s speed=17.4x
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 30 times
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 7 times
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 2 times
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 34 times
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 1 times
frame= 821 fps=410 q=2.0 size= 1960kB time=00:00:34.26 bitrate= 468.7kbits/s speed=17.1x
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 71 times
[msmpeg4 @ 0x5648e407cb60] warning, clipping 2 dct coefficients to -127..127
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 82 times
frame= 1026 fps=409 q=2.0 size= 2695kB time=00:00:42.96 bitrate= 513.8kbits/s speed=17.1x
[msmpeg4 @ 0x5648e407cb60] warning, clipping 1 dct coefficients to -127..127
Last message repeated 102 times
frame= 1202 fps=400 q=1.6 size= 3754kB time=00:00:50.13 bitrate= 613.4kbits/s speed=16.7x
......
frame=127987 fps=301 q=2.0 Lsize= 753842kB time=01:28:52.77 bitrate=1158.0kbits/s speed=12.6x
video:650704kB audio:83244kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.710554%EDIT :
My workaround was to encode to MPEG, doing this, i’m able to read my file and the frame rate is same as source. If someone knows why it couldn’t keep the original framerate in wmv, i’m still interested to know. -
ffmpeg command to copy raw data into MP4 hangs and never finishes
28 mai 2019, par James AdamsI am running an
ffmpegcommand to copy raw H.265 data into an MP4 file and the command never completes. The file isn’t large, just 10 seconds worth of data. Here’s the command I’m running :$ ffmpeg -rtsp_transport tcp -i rtsp://user:pass@71.185.124.195:554/c1/b1558830329/e1558830339/replay/ -vcodec copy -y test_clip.mp4I then get output like this :
ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, rtsp, from 'rtsp://user:pass@71.85.104.195:554/c1/b1558830329/e1558830339/replay/':
Metadata:
title : ONVIF RTSP Server
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709, progressive), 1920x1080, 30 fps, 30 tbr, 90k tbn, 60 tbc
Stream #0:1: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (pcm_mulaw (native) -> aac (native))
Press [q] to stop, [?] for help
[aac @ 0x55b71ce31900] Too many bits 8832.000000 > 6144 per frame requested, clamping to max
Output #0, mp4, to 'test_clip.mp4':
Metadata:
title : ONVIF RTSP Server
encoder : Lavf57.83.100
Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709, progressive), 1920x1080, q=2-31, 30 fps, 30 tbr, 90k tbn, 90k tbc
Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, mono, fltp, 48 kb/s
Metadata:
encoder : Lavc57.107.100 aac
[mp4 @ 0x55b71ce17e00] Non-monotonous DTS in output stream 0:0; previous: 18000, current: 3000; changing to 18001. This may result in incorrect timestamps in the output file.
[mp4 @ 0x55b71ce17e00] Non-monotonous DTS in output stream 0:0; previous: 18001, current: 6000; changing to 18002. This may result in incorrect timestamps in the output file.
[mp4 @ 0x55b71ce17e00] Non-monotonous DTS in output stream 0:0; previous: 18002, current: 9000; changing to 18003. This may result in incorrect timestamps in the output file.
[mp4 @ 0x55b71ce17e00] Non-monotonous DTS in output stream 0:0; previous: 18003, current: 12000; changing to 18004. This may result in incorrect timestamps in the output file.
[mp4 @ 0x55b71ce17e00] Non-monotonous DTS in output stream 0:0; previous: 18004, current: 15000; changing to 18005. This may result in incorrect timestamps in the output file.
[mp4 @ 0x55b71ce17e00] Non-monotonous DTS in output stream 0:0; previous: 18005, current: 18000; changing to 18006. This may result in incorrect timestamps in the output file.
frame= 44 fps=0.0 q=-1.0 size= 256kB time=00:00:01.43 bitrate=1463.4kbits/frame= 60 fps= 57 q=-1.0 size= 512kB time=00:00:01.96 bitrate=2132.9kbits/frame= 76 fps= 48 q=-1.0 size= 768kB time=00:00:02.50 bitrate=2516.7kbits/frame= 92 fps= 44 q=-1.0 size= 1024kB time=00:00:03.03 bitrate=2765.6kbits/frame= 108 fps= 41 q=-1.0 size= 1024kB time=00:00:03.56 bitrate=2352.0kbits/[NULL @ 0x55b71cdfa540] SEI type 5 size 2208 truncated at 1944
frame= 123 fps= 39 q=-1.0 size= 1280kB time=00:00:04.06 bitrate=2578.6kbits/frame= 139 fps= 38 q=-1.0 size= 1536kB time=00:00:04.60 bitrate=2735.5kbits/frame= 155 fps= 37 q=-1.0 size= 1536kB time=00:00:05.13 bitrate=2451.3kbits/frame= 171 fps= 36 q=-1.0 size= 1792kB time=00:00:05.66 bitrate=2590.7kbits/frame= 187 fps= 36 q=-1.0 size= 2048kB time=00:00:06.20 bitrate=2706.1kbits/frame= 203 fps= 35 q=-1.0 size= 2304kB time=00:00:06.73 bitrate=2803.2kbits/frame= 219 fps= 35 q=-1.0 size= 2304kB time=00:00:07.26 bitrate=2597.4kbits/frame= 235 fps= 34 q=-1.0 size= 2560kB time=00:00:07.80 bitrate=2688.7kbits/frame= 246 fps= 33 q=-1.0 size= 2560kB time=00:00:08.16 bitrate=2568.0kbits/frame= 267 fps= 34 q=-1.0 size= 3072kB time=00:00:08.86 bitrate=2838.3kbits/frame= 282 fps= 34 q=-1.0 size= 3072kB time=00:00:09.36 bitrate=2686.8kbits/frame= 298 fps= 33 q=-1.0 size= 3328kB time=00:00:09.90 bitrate=2753.9kbits/frame= 314 fps= 33 q=-1.0 size= 3328kB time=00:00:10.43 bitrate=2613.1kbits/^Cspeed=1.11xThe command never completes and I need to kill it using
Ctrl-C.I have also tried adding the options
-nostdin -loglevel errorand appending this to the end of the command :> /dev/null 2>&1 < /dev/nullbut to no avail.I am testing the above since it mimics the actual code I’m developing which utilizes a Python package that wraps calls to
ffmpeg. The Python code below works well on a laptop but hangs on EC2 (both are Ubuntu 18.04) :import argparse
import datetime
import ffmpeg
# ------------------------------------------------------------------------------
if __name__ == "__main__":
# USAGE
# $ python collect_and_store.py --rtsp rtsp://user:pass1@71.85.125.110:554 \
# --duration 30 --count 10
# construct the argument parser and parse the arguments
args_parser = argparse.ArgumentParser()
args_parser.add_argument("--rtsp",
required=True,
type=str,
help="RTSP URL for video stream")
args_parser.add_argument("--duration",
required=True,
type=int,
help="duration of saved clips (in seconds)")
args_parser.add_argument("--count",
required=True,
type=int,
help="number of clips to save")
args = vars(args_parser.parse_args())
# sanity check for some of the arguments
if not args["rtsp"].lower().startswith("rtsp://"):
raise ValueError("Invalid input URL -- only RTSP supported")
seconds_per_clip = args["duration"]
start = int(datetime.datetime.now().strftime("%s"))
end = start + seconds_per_clip
number_of_files_to_collect = args["count"]
while number_of_files_to_collect > 0:
# build URL with start and end times
# NOTE URL is for Uniview RTSP, add options for other camera types
url = args["rtsp"] + f"/c1/b{start}/e{end}/replay/"
# file where we'll write clip data
temp_file = f"clip_b{start}_e{end}.mp4"
# create the equivalent of the ffmpeg command:
# $ ffmpeg -i -vcodec copy -y -rtsp_transport tcp
stream = ffmpeg.input(url)
stream = ffmpeg.output(stream, temp_file,
**{"codec:v": "copy",
"rtsp_transport": "tcp",
"y": None
}
)
ffmpeg.run(stream)
print(f"\n\nMP4 file created: {temp_file}")
number_of_files_to_collect -= 1
start = end + 1
end = start + seconds_per_clip -
Revision 103918 : Avec https://zone.spip.org/trac/spip-zone/changeset/103864/ et ...
12 avril 2017, par spip.franck@… — LogAvec https://zone.spip.org/trac/spip-zone/changeset/103864/ et https://zone.spip.org/trac/spip-zone/changeset/103875/ j’avais fait trop fort en changeant aussi le nom alors que c’est toujours le même contrairement à l’url.
Donc, je corrige :-)
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